Meanwhile, Shelly-Ann Fraser-Pryce and Murielle Ahoure ran the joint-fastest women's 100m time of the season.

Jamaican Fraser-Pryce and Ahoure of the United States both clocked 10.81secs in Eugene.

Leading 200m times in 2015

1 Justin Gatlin (USA) 19.68 seconds

2 Dedric Dukes (USA) 19.99secs

3 Andre De Grasse (Can) 20.03secs

Gatlin has made an impressive start to the outdoor campaign, with his 200m time on Saturday eclipsing world record holder Usain Bolt's season's best of 20.13secs - posted in the Czech Republic this week.

American Tyson Gay won the men's 100m in a time of 9.88secs ahead of countryman Mike Rodgers and China's Su Bingtian, with Britain's James Dasalou sixth in 10.13secs.

Su, 25, recorded the first ever sub-10 seconds 100m by an Asian-born sprinter, clocking 9.99secs three months before the World Championships in his home country.

Olympic champion Kirani James comfortably saw off the challenge of LaShawn Merritt in the men's 400m.

Britain's Lynsey Sharp finished seventh in the 800m with a time of two minutes and 0.61 seconds, while compatriot Hannah England was 13th in the 1500m.

And GB pair Charlie Grice and Jake Whightman were eighth and 14th respectively in the men's mile.